Indus Industrial Group supplies high-performance Geosynthetic Clay Liners (GCL) comprising a high-swelling natural sodium bentonite clay core needle-punched between woven and nonwoven geotextile encapsulation layers, with total mass per unit area ratings from 4,000 to 5,000 g/m². Manufactured to GRI-GCL3 and ASTM D5887 standards, GCL mats deliver self-healing hydraulic conductivity below 5 × 10⁻¹¹ m/s. Engineered for municipal water storage reservoirs, irrigation canal bed waterproofing, and composite landfill bottom barriers in Iraq, GCL replaces thick, costly compacted clay layers (CCL) with a thin, rollable engineered barrier.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Total Mass per Unit Area | 4,000 g/m² to 5,000 g/m² (ASTM D5993) |
| Bentonite Swell Index | ≥ 24 ml / 2g (High-Grade Natural Sodium Bentonite per ASTM D5890) |
| Bentonite Fluid Loss | ≤ 18 ml (ASTM D5891) |
| Hydraulic Conductivity (k) | ≤ 5.0 × 10⁻¹¹ m/s (Permeability tested per ASTM D5887) |
| Carrier Geotextile | Polypropylene Woven Fabric (High Tensile Reinforcement) |
| Cover Geotextile | Polypropylene Nonwoven Needle-Punched Fleece |
| Internal Shear Strength | ≥ 30 kPa (tested per ASTM D5321 / ASTM D6243) |
| Standard Roll Dimensions | Width 4.5m to 5.0m × Length 30m to 40m per roll |
| Tensile Strength | ≥ 10 kN/m (tested per ASTM D6768) |
| Governing Standard | GRI-GCL3 / ASTM D5887 / ISO 9001 Certified |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | HDPE Geomembrane Reservoir & Canal Liners |
Irrigation canal waterproofing, municipal wastewater retention pond bottom lining, landfill containment composite barriers, tank farm bund containment, and dam waterproofing across Wasit, Basra, Baghdad, Kirkuk, and Nineveh.
Compacting 1 to 2 meters of natural clay along vast canal beds and reservoir footprints in Iraq is economically prohibitive and prone to desiccation cracking under intense Middle Eastern desert heat. Geosynthetic Clay Liners (GCL) deliver an engineered composite hydraulic barrier where a uniform layer of premium natural sodium bentonite clay (minimum 75% montmorillonite content) is encapsulated between high-tensile polypropylene woven and nonwoven geotextiles.
Through precision needle-punching technology, thousands of fibers are pulled through the bentonite core and thermally locked into the backing geotextile, providing high internal shear strength that resists slope slippage. When hydrated by groundwater or canal water, the sodium bentonite swells up to 15 times its dry volume under confinement, forming a dense, self-healing gelatinous barrier with an ultra-low hydraulic conductivity (k ≤ 5 × 10⁻¹¹ m/s).
A primary engineering advantage of GCL is its remarkable self-healing capability: if punctured by minor gravel rocks during backfilling or installation, the swelling bentonite naturally flows into and seals the puncture. Often installed beneath an HDPE geomembrane to create the ultimate composite barrier (GCL + HDPE) mandated in municipal landfill and oilfield hazardous wastewater regulations. Staged in rolls at Indus Erbil and Basra hubs.
A 6mm GCL mat provides equal or superior hydraulic sealing compared to a 1.0-meter thick compacted clay layer. It installs 5 times faster with simple unrolling, requires no heavy soil moisture conditioning, and does not crack when drying.
Rolls are overlapped by 300mm. Loose sodium bentonite powder (supplied in companion 25kg bags) is poured into the overlap zone at a rate of 0.4 kg/meter. When water hits the overlap, the bentonite expands to create an impermeable seamless seal.
Yes. Combining GCL with an HDPE geomembrane forms a "composite liner", which is the international gold standard for hazardous wastewater containment and modern sanitary landfills in Iraq.
